{"id":9758,"date":"2026-07-05T12:48:39","date_gmt":"2026-07-05T12:48:39","guid":{"rendered":"https:\/\/materialparts.com\/4n25\/"},"modified":"2026-07-05T12:48:39","modified_gmt":"2026-07-05T12:48:39","slug":"4n25","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/4n25\/","title":{"rendered":"4N25"},"content":{"rendered":"<h2>Productos<\/h2>\n<p>The 4N25 from Vishay is a phototransistor output optocoupler with base connection, providing 5300Vrms input-to-output isolation voltage. It consists of a gallium arsenide infrared LED optically coupled to a silicon phototransistor, with a minimum current transfer ratio (CTR) of 20% at 10mA forward current.<\/p>\n<h2>Especificaciones<\/h2>\n<ul>\n<li>Type: Phototransistor Output Optocoupler with Base Connection<\/li>\n<li>Manufacturer: Vishay (and others)<\/li>\n<li>Isolation Voltage VISO: 5300 Vrms<\/li>\n<li>CTR (min): 20% @ IF=10mA<\/li>\n<li>Collector-Emitter Voltage BVCEO: 30V<\/li>\n<li>Collector-Base Voltage BVCEO: 70V<\/li>\n<li>Emitter-Collector Voltage BVECO: 7V<\/li>\n<li>Forward Current IF: 60mA continuous \/ 3A peak<\/li>\n<li>Reverse Voltage VR: 6V<\/li>\n<li>Forward Voltage VF: 1.65V max @ IF=10mA<\/li>\n<li>Collector Current IC: 100mA<\/li>\n<li>VCE(sat): 0.5V max @ IF=10mA, IC=0.5mA<\/li>\n<li>Collector Dark Current ICEO: 50nA typ @ VCE=10V<\/li>\n<li>Bandwidth: 150kHz<\/li>\n<li>Rise Time tr: 2us typical<\/li>\n<li>Fall Time tf: 100us typical<\/li>\n<li>Total Power Dissipation: 250mW (input) \/ 150mW (output)<\/li>\n<li>Operating Temp: -55C to +100C<\/li>\n<li>Storage Temp: -55C to +150C<\/li>\n<li>Package: DIP-6<\/li>\n<li>Compliance: IEC 60747-5-2, RoHS<\/li>\n<\/ul>\n<h2>Caracter\u00edsticas<\/h2>\n<ul>\n<li>5300Vrms high voltage isolation between input and output<\/li>\n<li>Base connection for gain adjustment and speed optimization<\/li>\n<li>20% minimum CTR at 10mA for reliable signal transfer<\/li>\n<li>DIP-6 industry-standard footprint<\/li>\n<li>Available in 10kV high-isolation version (4N25-300)<\/li>\n<li>IEC 60747-5-2 compliant for safety isolation<\/li>\n<\/ul>\n<h2>Aplicaciones<\/h2>\n<ul>\n<li>AC-DC and DC-DC switching power supply feedback loops<\/li>\n<li>PLC digital I\/O isolation<\/li>\n<li>Motor drive signal isolation<\/li>\n<li>Medical equipment patient isolation<\/li>\n<li>Industrial automation I\/O isolation<\/li>\n<li>Telecom line card isolation<\/li>\n<li>SMPS error feedback loop<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The 4N25 from Vishay is a phototransistor output optocoupler with base connection, providing 5300Vrms input-to-output isolation voltage. It consists of a gallium arsenide infrared LED optically coupled to a silicon phototransistor, with a minimum current transfer ratio (CTR) of 20% at 10mA forward current. Key Specifications Type: Phototransistor Output Optocoupler with Base Connection [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[1029],"chip_brand":[136],"class_list":["post-9758","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-4n25","chip_brand-vishay"],"acf":{"brief_explanation":"Phototransistor optocoupler, 5.3kV isolation, 20% CTR, DIP-6, base connection, Vishay 4N25","date_code":"","package_case":"DIP-6 (6-Pin Dual Inline)","in_stock":11559,"datasheet":"https:\/\/www.vishay.com\/docs\/83725\/4n25.pdf","price":"$0.32 @ 1ku","product_introduction":"The 4N25 from Vishay is a phototransistor output optocoupler with base connection providing 5300Vrms isolation voltage, 20% minimum CTR at 10mA, and 150kHz bandwidth in a DIP-6 package.","working_principle":"The 4N25 consists of a gallium arsenide infrared LED and a silicon NPN phototransistor separated by an optically transparent isolation barrier. When current flows through the LED, it emits infrared light that is detected by the phototransistor base region, causing collector current to flow proportional to the LED current (CTR). The base pin allows external biasing for speed\/gain tradeoff. The isolation barrier provides 5300Vrms electrical isolation between input and output circuits.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>Anode<\/td><td>LED anode (connect via current-limiting resistor)<\/td><\/tr><tr><td>2<\/td><td>Cathode<\/td><td>LED cathode (connect to ground)<\/td><\/tr><tr><td>3<\/td><td>NC<\/td><td>No connect (internal)<\/td><\/tr><tr><td>4<\/td><td>Emitter<\/td><td>Phototransistor emitter<\/td><\/tr><tr><td>5<\/td><td>Collector<\/td><td>Phototransistor collector<\/td><\/tr><tr><td>6<\/td><td>Base<\/td><td>Phototransistor base (leave open or bias for speed)<\/td><\/tr><\/table>","application_scenarios":"<ul><li>AC-DC\/DC-DC SMPS feedback loop<\/li><li>PLC digital I\/O isolation<\/li><li>Motor drive signal isolation<\/li><li>Medical equipment patient isolation<\/li><li>Industrial automation I\/O isolation<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Spec1<\/th><th>Spec2<\/th><\/tr><tr><td>4N35<\/td><td>Vishay<\/td><td>CTR 100% min<\/td><td>Higher CTR<\/td><\/tr><tr><td>PC817<\/td><td>Sharp<\/td><td>CTR 50-300%<\/td><td>DIP-4 no base<\/td><\/tr><tr><td>6N137<\/td><td>Vishay<\/td><td>10Mbps high speed<\/td><td>Logic output<\/td><\/tr><tr><td>TLP291<\/td><td>Toshiba<\/td><td>DIP-4 SOP<\/td><td>SMD version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=9758"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9758\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=9758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=9758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=9758"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=9758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}